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Unread 06-10-2013, 09:01 PM   #61
tleeming
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Breckman99
Thanks for the update.
I finally talked my local Merc. dealer into listening to the Jeep today. His written response was:
"Does have some valve train noise but nothing excessive, checked our service bulletins but found nothing that compared, customer should just monitor for now"

So, I must say I don't feel particularly relieved of my concerns!
I do have some Bardahl diesel additive and after reading the other forum thread I may try that.

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Unread 06-11-2013, 05:28 AM   #62
LJS8510
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Quote:
Originally Posted by tleeming View Post
Breckman99
Thanks for the update.
I finally talked my local Merc. dealer into listening to the Jeep today. His written response was:
"Does have some valve train noise but nothing excessive, checked our service bulletins but found nothing that compared, customer should just monitor for now"

So, I must say I don't feel particularly relieved of my concerns!
I do have some Bardahl diesel additive and after reading the other forum thread I may try that.
It sounds like some of these additives can really help quiet things down.
Please keep us unto date on it.
good luck
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Unread 08-26-2013, 09:10 AM   #63
tleeming
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Well, I have run the Jeep with Bardahl additive and 2 cycle TCW-3 and can report no change in the rattle. In between all this I had a fuel leak which resulted in the fuel rail and feeder tube being replaced to the tune of $2000.
I'm thinking it's time for a change of vehicle.
Tony
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Unread 08-26-2013, 12:54 PM   #64
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Quote:
Originally Posted by tleeming View Post
Well, I have run the Jeep with Bardahl additive and 2 cycle TCW-3 and can report no change in the rattle. In between all this I had a fuel leak which resulted in the fuel rail and feeder tube being replaced to the tune of $2000.
I'm thinking it's time for a change of vehicle.
Tony
interesting, so what happened? did you get the old parts back to have a look at what failed?
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Unread 08-28-2013, 11:21 AM   #65
tleeming
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I did have a good look at the rail and tube and could not see anything....I assume there I a very high pressure so probably the connection thread on one of them was leaking.All is well for now!
Tony
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Unread 08-28-2013, 04:55 PM   #66
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thanks tony, if it's not to much trouble, could you post a pic of the failed parts? or did they already end up in the trash?
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Unread 09-08-2013, 01:34 PM   #67
tleeming
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Suzieque

Photos of the replaced fuel rail and pipe as requested.
You can see some corrosion on the rail.
Jeep is going in tomorrow for a second opinion on the "rattle"
Tony
img_6583.jpg

img_6584.jpg

img_6586.jpg

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Unread 09-09-2013, 10:21 PM   #68
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Tony,

Its too bad you are having so much trouble with that Jeep. I wonder what caused the corrosion on the fuel rail? Do you frequent snowmelt applied roads with salt or magnesium chloride? That is worrisome, another fault to watch out for.

Has your rattle changed at all? Since reclocking the CP3 pump gear mine has not increased in intensity or changed when it is active, still a light tick a idle and the rattle above 1100 rpm or so. If you will recall the tick at idle was not present prior to changing the pump relationship with the engine, also intensity was slightly reduced. This fact alone has me a bit uneasy with the conclusion that the noise was caused by the bypass solenoid, and may indicate a trouble in one of the three displacement piston chambers/assemblies. I still have not stopped by the Bosch injection shop to find out for sure, dreading the bill if it is the worst case.
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Unread 09-10-2013, 10:27 AM   #69
tleeming
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Re: the fuel rail...the tech connect info the mechanic gave me says " high pressure fuel lines deliver fuel under extreme pressure from the injector pump to the fuel rail and from the fuel rail to the fuel injectors. This pressure may be as high as 1600 bar..23,200psi"!!! So it may be just engine vibration wearing out the threads on the supply tube.

But back to the engine rattle...sorry to have been off topic on this thread.

I took the Jeep into another dealer and got a second opinion.
Even hearing my video he was not sure what I was getting at!!
Anyway, we ran the car and he finally heard it. Suggested that is either valve train lifters or timing chain guides/tensioners.
He advised he had never stripped down a JGC diesel engine yet. So, I guess I just drive it!
I'm still thinking of at least re-placing the tensioner. I have read on the forum that Mercedes increased the length of the tensioner by 5mm. So, if I order a new one, I want to make sure I get the longer one. The two part nos. I have are:
642 050 03 11
68017937AA
I think these are the same part..does anyone know if the part no. changed with the longer one?

Thanks guys.. as ever,
Tony
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Unread 09-17-2013, 10:28 AM   #70
tleeming
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Regarding the part nos. I posted for the chain tensioner. As suspected, the two part nos. are the same.
The parts man at the dealership advised that the number is correct and has not been superceded.
So, maybe the change came on a Mercedes model vehicle??
Tony
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Unread 11-01-2013, 09:23 AM   #71
tleeming
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Hi, I have I finally replaced my timing chain tensioner. Shipped from the US the total cost was $100 as against $246 from my local dealer.
Whoever posted the pics on how to do it, thanks.
As expected there was no change in the rattle, but the part I removed did not have full range on the spring when you pushed it back, not that would have made a difference.
So, I'm on the road pulling my 6000 lb trailer to Mexico again with fingers crossed that if anything happens it will happen in the US.
Emptying the tube below my Provent CC filter is a daily job now as when towing, the flow from the crankcase must be huge.
Chou for now
Tony
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Unread 11-29-2013, 09:49 PM   #72
tleeming
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Well 5000 kms later and we have reached our destination in Mexico. The timing chain is still rattling, maybe a little more.
After reading about the new diesel JGC I realize I am not going to be able to bring it down here until Mexico has ULSD.
So, considering I have just turned 100,000kms I think it will keep it and get the timing chain rattle fixed if it gets us home in April 14
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